Lexical Definition

‎ἐξαυτῆς‎ exautēs (ex-ow'-tace) immediately ^G:ADV
from ‎ἐκ‎ and the genitive case singular feminine of ‎αὐτός‎ (‎ὥρα‎ being understood)

by and by, immediately, presently, straightway.

• from that hour, i.e. instantly

Abbott-Smith

* ἐξ-αυτῆς (a κοινή word, = ἐξ αὐτῆς τ. ὥρας)
at once, forthwith: Mk 6:25, Ac 10:33 11:11 21:32 23:30, Phl 2:23.†

Abbott-Smith References

Liddell-Scott-Jones

ἐξαυτῆς,

adverb, for ἐξ αὐτῆς [τῆς ὁδοῦ], at once, [NT+6th c.BC+]

_{LSJ Scripture Refs: Mark.6.25}